Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d306209abb34194…

MALICIOUS

PDF

43.5 KB Created: 2021-05-14 07:00:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: add3e7510d290e98ad0af7be7448a175 SHA-1: 27bbd7a7b905f2a09070219e9845839156e63cd1 SHA-256: 1d306209abb34194e19bbed14806925d77fa029fbb7f67d4bcc48a339bcc9b6e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' to lure victims. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-without-downloading-apps-game-hack. While no scripts were directly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-hack-without-downloading-apps-game-hack In PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A45 25416 bytes
SHA-256: cf4ccaad50622be3d0b60f045afd074ae49388b8355b03ddd0c4df3d0cecb9ad
font_01_sfnt_off000084cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 19264 bytes
SHA-256: 99f86527aad2d2c4e0c2a6dc22010d489b80471d19b97ecb32fe988289f363dc

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